Additional matrix elements, which are involved in the calculation below, are all mass independent
and are induced by the interactions (REF ) and (REF ) [1]}:
\(\left\langle g_{i}^{a}(k)\left|H_{g}\right| 0\right\rangle =\frac{g \mathbf {k}^{i} \rho ^{a}(-\mathbf {k})}{4 \pi ^{3 / 2}\left|k^{+}\right|^{3 / 2}},\) 
